冻融循环和氯盐侵蚀耦合条件对聚合物快硬水泥混凝土抗冻性的影响<sup>*</sup>

doi:10.11896/j.issn.1005-023X.2017.023.026

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Abstract The use of deicing salt in the winter of northern China can seriously affect the durability of concrete for bridge deck overlays. In order to solve this problem, the law of freezing-thawing damage development under different situation has been studied. Rapid hardening sulphoaluminate cement(SAC), polymer-modified fast-hardening cement(JS) and ordinary Portland cement(P.O) were placed in NaCl solution with mass concentration of 0% and 3.5% to conduct fast freeze-thaw cycles experiment. Besides, with the help of SEM, the internal damage mechanism of different kinds of concrete under water and salt freezing environment were analyzed. Results showed that compared with the concrete in salt freezing situation, the sample in water freezing si-tuation did not show apparent mass loss, which meant that the freezing-thawing damage rate was slow and the damage was in a low degree. The antifreeze characteristic sequence of concrete both in two situations is P.O>JS>SAC. In salt freezing situation, more Fridel salt was yielded as corrosion products, which aggravated the collapsing of concrete.

Key words： polymer sulphoaluminate cement freeze-thaw cycles frost resistance

Published: 08 May 2018

CLC number:

TU528.41

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	Articles by authors
	NAN Xueli
	WANG Chaojie
	LIU Jinxin
	HAN Bo
	YANG Lanlan

Cite this article:

NAN Xueli,WANG Chaojie,LIU Jinxin, et al. Influence of the Freeze-Thaw Cycle and Chlorine Salt Erosion Coupling Conditions on Frost-resistance of Polymer-modified Rapid Hardening Concrete[J]. Materials Reports, 2017, 31(23): 177-181.

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http://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2017.023.026 OR http://www.mater-rep.com/EN/Y2017/V31/I23/177

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